package cn.edu.ctbu.dp01.service;

import cn.edu.ctbu.dp01.constant.REnum;
import cn.edu.ctbu.dp01.dao.StudentRepository;
import cn.edu.ctbu.dp01.entity.Student;
import cn.edu.ctbu.dp01.exception.RException;
import org.junit.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Example;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
public class StudentService {
    @Autowired
    public StudentRepository studentRepository;
    public Page<Student> getAll(Pageable pageable){
        return studentRepository.findAll(pageable);
    }
    public Page<Student>getAll(Example<Student> example,Pageable pageable){
        return studentRepository.findAll(example,pageable);
    }
    public List<Student> getAll(){
        return studentRepository.findAll();
    }
    /**
     * 按照id查询
     * @param id 组件 id
     * @return
     */
    public Student findById(int id){
        return studentRepository.findById(id).get();
    }
    public List<Student> findByName(String name){
        return studentRepository.findByNameLike(name);
    }
    public List<Student> findByNameAndAge(String name,int age){
        return studentRepository.findByNameAndAge(name,age);
    }
    public void Insert(Student student){
        studentRepository.save(student);
    }

    /**
     * 新增学生
     */
    public Student add(Student student) {

        return studentRepository.save(student);
    }

    /**
     * 更新学生
     */
    public Student update(Student student) {

        return studentRepository.save(student);
    }
    /**
     * 删除学生
     */
    public void delete(Integer id) {
        studentRepository.deleteById(id);
    }


    public Student updateStudent(Student student) {
        studentRepository.updateStudent(student.getId(),student.getName());
        return student;
    }

    public void deleteById(int id) {
        studentRepository.deleteById(id);
    }
    public Student validDateUsernameAndPassword(String sno,String password) throws Exception{
        List<Student>students=studentRepository.findBySno(sno);
        if(students.size()>0){
            Student student=students.get(0);
            if(student.getPassword().equals(password)){
                return student;
            }else{
                throw new RException(REnum.LOGIN_ERR);
            }
        }else{
            throw new RException(REnum.LOGIN_ERR);
        }
    }
}

